Download App

The Special Theory of Relativity — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsThe Special Theory of Relativity2 Marks
Question
Two babies are born in a moving train, one in the compartment adjacent to the engine and other in the compartment adjacent to the guard. According to the train frame, the babies are born at the same instant of time. Who is elder accordmg to the ground frame?
✓

Answer

The clocks of a moving frame are out of synchronization. The clock at the rear end leads the one at from by $\text{l}_0\frac{\text{V}}{\text{C}^2}$ where $\text{l}_0$ is the rest separation between the clocks, and v is speed of the moving frame. Thus, the baby adjacent to the guard cell is elder.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from The Special Theory of Relativity→The Special Theory of Relativity — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Subtract $2.5 \times 10^4$ from $3.9 \times 10^5$ with due regard to significant figures.
→
Prove that the work done by a thermodynamic system depend on the path on which the expansion take place.
→
Find out when a 50 m long steel rod of 10 $c m ^2$ cross-section is heated from $0^{\circ} C$ to $50^{\circ} C$ (i) increase in length of rod (ii) if both the ends of the rod are connected to rigid supports, then the force produced in it will know thermal stress. (Given $\alpha=1.2 \times 10^{-5}{ }^{\circ} C ^{-1}$ and $\left.Y =9.6 \times 10^7 N / m ^2\right)$
→
The radius of atom is of the order of $2\mathring{\text{A}}$ and radius of a nucleus is of the order of fermi. How many magnitudes higher is the volume of atom as compared to the volume of nucleus?
→
A player throws a ball upwards with an initial speed of 29.4m s–1.
What are the velocity and acceleration of the ball at the highest point of its motion?
→
Is the vector sum of the unit vectors $\vec{\text{i}}$ and $\vec{\text{j}}$ unit vector? If no, can you multiply this sum by a scalar number to get a unit vector?
→
Which of the following functions of time represent (a) simple harmonic, (b) periodic but not simple harmonic, and (c) non-periodic motion? Give period for each case of periodic motion ($\omega$ is any positive constant):

$3\cos\Big(\frac{\pi}{4}-2\omega\text{t}\Big)$

→
A person can hear sound waves in the frequency range 20Hz to 20kHz. Find the minimum and the maximum wavelengths of sound that is audible to the person. The speed of sound is 360m/s.
→
Calculate the energy required to move a body of mass $m$ from an orbit of radius $2 R$ to $3 R$.
→
The particle position in one-dimensional motion is
$
x=\left(3+4 t-t^2\right) \text { meter }
$
Draw the displacement velocity diagram for this motion from the time interval $t=0 sec$ to $t=4 sec$.
→